Prejudice often involves creating an opinion of a person based off some quality that doesn't directly correlate to that person's character. For example, homomsexuality doesn't necessarily make a person bad; but for that quality, some people hate.

1) a term that when used implies that someone has mistakenly and usually hatefully expected something, usually negitive, from a certain other or group of others.
2) Anytime you assume someone will help/hurt you based on all the knowledge availible, usually the knowledge doesn't tell the full story.

1) the prejudice girl clutched her purse when the black guy walked by.
2) I asked the cop where the nearest drugstore was but he didn't know.

The condition of believing that one group, most often one the prejudor belongs to, is superior to another group. Most often applies in a negative manner, against those of different race, religion, creed, and nationality. see stereotype, anti-semetism, racism.

Hating people because they're black, gay, Jewish, Muslim, or whatever doesn't make much sense. You can easily find ways to hate people on an individual basis.